Brooke Clarke wrote: > Hi Chuck: > > Not all of the U.S. uses DST, so there's a control group.
That's true, but it cannot be said that the areas that don't use DST are equivalent to those that do in all respects that might cause heart problems. It is thought the change in sleep/wake patterns is what causes the stress to the heart, so I would be most interested in what happened to identical populations when the DST date changed. Unfortunately, he study period was from 1987 through 2006, so I believe it missed the shift in DST dates. The Swedish researchers that did the study said the number of heart attacks drops 5% for the 7 days after the US changes from DST to standard time, and spikes on the Monday we go back to DST. I expect that the daily risk will be found to shift with the change in the DST date. -Chuck Harris _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
